Balanced hydraulic valve.



. No. 763,889. PATENTBD JUNE ze, 1904. F. HENNEBGHLE. BALANGED HYDRAULIC VALVE.

APPLIGATION FILED 00T. 30. 1903. N0 MODEL.

2 SHEETS-SHEET 1.

N.) Q 99 um QQ Q ,-No. 763,889. PATENTBD JUNE 28, 1904.

F. HEN-NBBHLB.

BALANGED HYDRAULIC VALVE. X APPLIGATION FILED ooT. so. 1903.

N0 MODEL. 1* E 2 SHEETS-SHEET 2.

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To all whom, t may concern:

UNITED STATES Patented June 28, 12104.

FRAK HENNEBHLE, OF CHICAGO, ILLINOIS.

BALANCD HYDRAULIC vVALVE..

SPECIFICATION forming part of Letters Patent No. 763,889, dated June 28, 1904.

Application led October 30,

` Be it known that I, FRANK HENNEBoi-ILE, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Balanced Hydraulic Valves, of which the following is a specification.

One ot' the objects of this invention is the production of a simple and compact Valve for controlling the inlet and outlet.to a doubleacting hydraulic cylinder, automatically opening the outlet oi' one end of such cylinder with the opening of the inlet to the other end of the cylinder.

A further object of the invention consists in the various improvements in valves of this character hereinafter shown `and described.

In the accompanying drawings, Figure lis a view showing my improved valve in side elevation. Fig. 2 is a vertical central section through said valve, taken on the plane of the dotted line 2 2 of Fig. 3. Fig. 3 is a horizontal section through the valve-casing, taken on the plane of dotted line 3 3 of Fig. 2. Fig. 4 is a similar view on dotted line 4 4 of Fig.

42. Fig. 5 is a fragmental vertical section on dotted line 5 5 of Fig.V 3. Figs. 6, 7, and 8 illustratemy said invention as applied to a three-way valve to be used in connection with single-acting hydraulic cylinders, Fig. 6 being a side elevation of said improved valve;=

Fig. 7, a vertical section on the plane of dotted line 7 7 of Fig. 8, and Fig. 8, a horizon-- tal section through the valve-casing on the plane of dotted line 8 8 of Fig. 7.

In the embodiment of this invention and referring particularly to that form illustrated in Figs. l, 2, and 3, I provide a casing A, having valve-chambers a', a2, a3, and a* therein and beneath said chambers and alined therewith the discharge-chambers a5, a, a7, and a, which valve-chambers and discharge-chambers are connected in pairs by openings c, the upper ends of the walls of which openings are outwardly inclined to form valve-seats. The valve-chambers e and a3 arek connected by a port (01,, and the discharge-chambers a and es are likewise connected by a port au, said ports am and au extending substantially at right angles to each other. At one side of Serial No. 179,143. (No model.)

the casing I provide an inlet opening e, placed in communication with the valve-chamber a by means of the port am, and at the opposite side of the casing Jform an outlet-opening a, which by means of the port alf cornmunicates with the discharge-chamber a6. In the remaining sides oi' the casing A, I form openings al yand au, the former of which is connected by the port a with the valve-chamber ci* and by means of the port al with the discharge-chamber e7, while the latter opening (au) is placed in communication with the valve-chamber a2 by means of the port a2 and l .iixed in any suitable manner with relation to their stems, and beneath said closures said .stems are formed with the radial guide-wings B. Above the closures each of the valvestems is provided with a piston B7, held in place upon said stem between an integral collar B8 and a locking-sleeve B9, which sleeve has a screw-thread connection with the valvestein. In order to render the valve substantially balanced, the closures B5 and pistons B7 are made of substantially the same diameter. Each oic the valve-stems is also provided with anpaxial opening B10, closed .at its lower end by means of a screw B11 and tapped intermediate the ends of the stems by means of the openings B12 and B1?. The upper end of each of the valve-stems B, B2, B3, and B* is provided with a yoke BM, secured thereto in any suitable manner, as by means of a screw-thread connection, and with the jam-nut B15 to permit of an adjustment oi' the position of said yoke with reference to the closure' B'r. An operating-lever B1, bit'u rcated at its lower end to provide two T-shape IOO ,. which cylinders one of the valve-stems passes and in which cylinder one oi' the pistons B7 closely fits. At its upper end the bushing C is closed by means oi' a stuHing-box C3 of ordinary construction, having a packing-ring C1, of leather or other suitable material, secured therein.

The lower open ends of the discharge-chambers a5, a, c?, and as are likewise closed with bushings D, having' screw-threaded stems D' to correspond with the similar screw-threads within the necks of said discharge-chambers, and the lower extremities of the bushings D are provided with stuffing-boxes D2, having packing-rings D3 for closely surrounding the valve-stems.

It will be noticed that the cylinders C2 communicate, respectively, with the dischargechambers d5, a, a1, and o8 by means of the openings B12 and B13 and the axial opening B1D in the valve-stems. By this means the pressure above the closure B5 of each ofthe valve-stems is equalized with that below said closure, and the valves thus balanced. In order to provide for a seating of the valve, it is desirable that the pressure above the closure be slightly greater than the pressure tending to raise it from its seat. Therefore it will be noticed that each of the valve-stems within the cylinders C2 is of a diameter slightly less than at a point below said closure.

1n operation a valve of the kind hereinbefore described is connected through the inletopening (L12 with the compressing means by a pipe, (not shown,) and with the opposite ends of a hydraulic cylinder by pipes communicating with the casing at the openings 0111 and a1?. The outlet-opening r11 is provided with a discharge-pipe. (Not shown.) Assuming' that the pressure-cylinder, the valve, and the pipes mentioned are filled with water under pressure, the pressure-water entering the inletpipe i12 passes through the port L11 to the valve chamber a and from this chamber through the port (i111 to the valve-chamber as, in which chambers a' and e1 pressure-water stands. Moving the operating-lever B1 in the direction of the arrow, as indicated in Figs. l and 2, raises the closures B5 of the valve-stems B2 and B3 from their seats, permitting pressure-water to iiow to the hydraulic cylinder through the port a1 and the opening (011'. This movement oi' the operating-lever also permits discharge-water to liow from the opposite end of said hydraulic cylinder through the opening L17 in the valve-casing, through the port 62 into the valve-chamber a2, and to discharge therefrom into the discharge-chamber c, thence through the port @15 and the outlet (L11. A movement of the operating-lever in the opposite direction raises the valve-stems B/ and B", lifting the closures B1 from their openings a and permitting pressure-water to fiow from the valve-chamber a' through the opening a, through the discharge-chamber a5, the port 021, and the opening r11 to that end of the hydraulic cylinder that was recently discharged. The movement of the operating-lever last mentioned also opened the discharge from the opposite end of said hydraulic cylinder through the opening a1, the port (i111 into the valve-chamber a1, through the opening a into the discharge-chamber a8, through the port L11 into the discharge-chamber a, and through the port c6111 to the outlet-opening 011.

In Figs. 6, 7,.and 8 a hydraulic Valve is shown by means of which pressure-water may be supplied to and removed from a singleacting hydraulic cylinder. n this modified form a casing E is provided with valve-chambers E and E2 and with discharge-chambers E3 and E1, connected in pairs, respectively, by means of the openings E5, the walls of which openings are inclined to form valveseats. On one side of the casing are two openings E1 and E7, the first an inlet-opening, the latter an outlet-opening, and on the opposite side is an opening E11, through which the valve is placed in communication with a hydraulic cylinder. (Not shown.) Valvestems F and F2 are provided for the valvechambers E and E2, respectively, each of which valve-stems has a closure F" and guidevanes F1. Each also has an axial opening F1, closed at its lower end by a screw F1 and tapped intermediate the ends of said valvestems by means of the openings F7 and F11. The upper end of each of the stems carries a yoke F, adjustably held upon the stem by means of a screw-thread connection and the jam-nut F10. The transverse arms F11 of a T- shape operating-lever F12 lie within the'yokes F9 and are pivotally connected therewith by means of the screws F11. The remaining parts of this modified form of valve are the same as in the principal form. In the operation of said modiiied form pressure-water enters the valve-chamber E through the inlet-opening E1. A movement of the lever F12 in the direction of the arrow, Fig. 7, permits the pressurewater to pass from the chamber E, through the opening E5, through the discharge-chamber E3, and thence through the opening E8 to the hydraulic cylinder. (Not shown.) By moving the operating-lever F12 in a contrary IOO IIO

direction the closure F3 of the valve-stem F2 is lifted from its seat and water is permitted to escape from said hydraulic cylinder through the opening ES, the discharge-chamber E4, and the outlet E7.

It is clear that various changes may be made in this valve without departing from the spirit and scope of my invention, wherefore I desire to have it understood that I do not limit myself to the particular construction herein shown and described.

I claim as my inventionl. In a hydraulic valve, in combination, a valve-casing having valve-chambers and discharge-chambers therein, and a valve-seat in each of said valve-chambers; a cylinder alined with each or' said valve-chambers; an inlet and an outlet closure for said valve-seats; and a valve-stem for each of said closures carrying a piston within its cylinder, each of said stems having means Jfor placing one of said discharge-chambers and one of said cylinders in communication with each other.

2. In a hydraulic Valve, in combination, a valve-casing having four valve-chambers and four discharge-chambers therein, and a valveseat in each of said valve-chambers; a cylinder alined with each of said valve-chambers; two inlet and two outlet closures for said valveseats; a valve stem for each of said closures carrying a piston within its cylinder, each of said stems having means for placing one of said discharge-chambers and one of said cylinders in communicaton with each other; and means for longitudinally sliding each of the inlet valve-stems and the corresponding one of the outlet valve-stems synchronously.

3. In a hydraulic valve, in combination, a valve-casing having valve-chambers and discharge-chambers in pairs therein; a cylinder alined with each pair of chambers; a valveclosure in each of said valve-chambers; a stem for cach of said closures, each stem lying within one of the valve-chambers, one of the discharge-chambers and one of the cylinders; and a piston on each Valve-stem within its cylinder, said stem being provided with an opening communicating between its dischargechamber and its cylinder.

4. In a hydraulic Valve, in combination, a Valve-casing having four valve-chambers and four discharge-chambers therein, and a valvescat in each of said valve-chambers; a cylinder alined with each of said valve-chambers; two inlet and two outlet closures for said valve-seats; avalve-stem for each of said closures, each of said stems having means for placing one of said discharge-chambers and one of said cylinders in communication with each other; a piston on each valve-stem within its cylinder; and an operating-lever bifurcated at one end to provide two T-shape arms, each of said arms being connected with an inlet valve-stem and an outlet valve-stem.

5. In a hydraulic valve, in combination, a valve-casing having four valve-chambers and four discharge -chambers in pairs therein; a cylinder for each of said pairs of chambers and alined therewith; two inlet valve-closures and two outlet valve-closures for said valvechambers; a stem for each closure, lying within one of the valve-chambers, one Iof the discharge-chambers and one of the cylinders and being provided with an axial opening communicating between its cylinder and its discharge-chamber; a piston on each valve-stem within its cylinder; and means for positively I sliding in either direction each of the inlet valve-stems and the corresponding one of the outlet valve-stems synchronously.

6. In a hydraulic valve, in combination, a valve-casing having four valve-chambersand four discharge-chambers in pairs therein; a bushing for each of said pairs of chambers, having a cylinder alined with said chambers; a valve-closure in each of said valve-chambers; a stem for each of said closures, each stem lying within one of the valve-chambers, one of the discharge-chambers and one of the cylinders; and a piston on each valve-stem within its cylinder, of substantially the same diameter as said closure, each stem being provided with an opening communicating between its discharge-chamber and its cylinder to the rear of said piston, said stern 'being of a larger diameter between said closure and piston than in other portions of its length.

FRANK HENNEBHLE.

Witnesses:

L. L. MILLER, GEORGE L. CHINDAHL. 

